Edge-lining machine



Sept. 23, 1924.

' 1,509,586 E. A. CHASE EDGE LINING MACHINE Filed March 29. 1921 4 Sheets-Sheet 1 ZZJWAQ/Zme m M r E. A. CHASE Sept. 23

EDGE L-INING MACHINE Filed March 29, 1921 4 Sheets-Sheet E. A. CHASE EDGE LININGMACHINE Filed March 29. 1921 4 Sheets-Sheet 5 @URWW E. A. CHASE EDGE LINING MACHINE Sept 23, 1924.

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4 Sheets-Sheet Patented Sept. 23, 1924.

UNITED STATES ELROY A. CHASE, OF NORTHTEIIELD, VERMONT.

EDGE-DINING MACHINE.

Application filed March 29, 1921.

To all whom it may concern:

Be it known that I, ELROY A. CHAS-E, a citizen of the United States, residing a Northfield, in the county of VVashington and State of Vermont, have invented a new and useful Edge-Lining Machine, of which the following is a specification.

This invention relates to a machine for lining or trimming the edges of a block of granite or other stone, the machine being for the same general purpose as that shown in the prior patent to Phillips #1,327,923 issued January 13, 1920.

It is the general object of my invention to provide a machine of this type which shall be simple in operation. and in which the grinding operation and the placing and adjustment of the stone shall be under the convenient control of a single operator.

\Vith this general object in view, impor tant features of my invention relate to improved arrangements for vertically adjusting the wheels toward and away from the work; to means for supporting the stone and automatically reciprocating the stone past the grinding wheels; to means for raising the stone above the supporting cross bars of the carriage thus permitting the stone to be readily moved or turned while in. raised position; to an improved wheel construction by which accurate travel of the carriage is insured; to improved driving con-- nections for the grinding wheels; and to other arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

' A preferred form of my invention is shown in the drawings in which Fig. 1 is a plan view of my improved machine Fig. 2 is an end elevation thereof partly in section, taken along the line 22 in F ig. 1: i

Fig. is a horizontal sectional view taken along the line 3 3 in Fig. 2;

Fig. 4: is a sideelevation of the grinding mechanism, looking in the direction of the arrow 1- in Fig. 2;

Fig. 5 is a partial side elevation showing the means for driving the grinding wheels;

Fig. 6 is a detail sectional elevation, taken along the line 6-6 in Fig. 5;

Fig. 7 is a partial side elevation of the Serial No. 456,671.

work carriage, looking inthe direction of the arrow 7 in Fig. 1;-

Fig. 8 is a transverse sectional elevation of the work carriage, taken along the line S--8 in Fig. 7;

Fig. 9 is a plan view of the car, looking in the direction of the arrow 9 in Fig. 8; and i Fig. 10 is a detail sectional elevation taken along the line 10-1O in Fig. 8.

Referring to the drawings, my improved edge lining machine comprises a pair of grinding wheels W and means for rotating the wheels and for vertically adjusting the wheels toward and from a block of stone S, a carriage on which the stone is supported, and means for moving the carriage back and forth past the grinding wheels and for raising the stone and for movingit relatively to the carriage.

I will'iirst describe the mechanism for supporting, adjusting, and driving the grinding wheels. A heavy, substantially triangular frame (Fig. i) is firmly secured to a suitable foundation and is provided with a vertically extending guide plate or casting 21'011 which a pair of bearing brackets 22 and 23 are vertically slidable. An adjusting screw 24: (Fig. 2) is mounted in a bearing 25 fixed to the uj per part of the frame 20 and is threaded in a nut 26 secured to the bearing bracket 22. The screw 24 is connected by bevel gears 27 (Fig. l), a horizontal shaft 28, bevel gears 29, a vertical shaft 30 and bevel gears 31 to a cross shaft 82*mounted in the base of the machine.

This shaft- 32 may be connected when desired by a clutch 33 (Fig. 1) to a driving shaft 34 which in turn is connected through bevel gears 35 to a shaft 36 having a friction wheel 37 keyed thereon. The wheel 37 is movable across the face of a driving disc 38 by which adjustment its speed may be varied and its direction of rotation may be reversed. The disc 38 is rotated in any convenient manner, as by a motor 39 and belt 40.

The lower bracket 23 is similarly movable vertically by an adjusting screw a l (Fig. 2), bevel gears 42, a horizontal shaft 43 (F 4) bevel gears 4-41- and a clutch shaft 45 adapted to be connected by a clutch 46 (Fig. 1) to a driving shaft 47 connected by gears d8 to the shaft 84 previously described. Suitable shift levers (not shown) are provided for controlling the clutches 33 and 46 and also for shifting the triction wheel 37. Either of the grinding wheels 15 'or WV may thus be raised or lowered as desired and at any desired speed.

Each grinding wheel 1V or 1V (Fig. 2) is mounted on a wheel shaft 50 rotatable in bearings 51 in a bearing plate supported on a projection of its associated bearing bracket and slightly adjustable longitudinally thereon by an adjusting screw 53. Such slight axial adjustment is desirable to bring the two wheels into accurate vertical alignment with each other.

The wheel shafts 50 are also provided with driving pulleys 54; and which may be connected by belts 56 and 57 (Fig. 5) to separate driving motors 58 and 59 mounted for horizontal sliding moven'ient upon fixed supports 60 and 61. Rollers 62 (Fig. 6) may be used to reduce the friction of this sliding movement.

The base of the motor 58 connected by a bar 63 to the bracket 22 which supports the upper grinding wheel \V, and the base of the motor 59 is similarly connected by a bar 64 to the bracket These connecting bars 63 and 64; hold the motors and their re spective grinding wheel shafts at approximately constant distances apart and thus permit vertical adjustment of the grinding wheels as desired without the use of guide or take-up pulleys.

I have found that a belt drive for the grinding wheels is particularly desirable in a machine of this type. as the belts introduce an element of elasticity and prevent vibrations of the grinding wheels which might produce defects in the finished surface.

The stone S (Fig. 8) normally rests upon cross bars 65 forming the. upper or bearing surface of a carriage 6 supported by wheels 67 and 68 on rails 69 and 70. The wheels 68 are each provided with a tixed flange 71 and a removable flange or plate 72, these flanges titting against the sides oi": the rail head. When the wheels 68 become worn. the flanges may be removed and the end of the tread portion of the wheel may be turned oil to reduce the distance between the flanges. thus restoring their close tit on the rail head.

A rack 7 is fixed to the under side of the carriage 66 and is engaged by a gear 7 on a cross shaft 75 2) connected through a Wormgear 7(' and worm 77 to ashat't- 78 which in turn, is connected by bevel gears 79 (Fig. l) to a counter shaft 80 on which are mounted tight pulleys 81 and 82 and a loose pulley 83. A straight belt 84 and cross belt 85 connect the pulleys on the counter shaft to a driving pulley 86 on the sh aft 87 which supports the driving pulley and triction disc 38. A ball thrust bearing 88 is casting 95.

preferably provided on the shaft 87 to rcsist the thrust of the friction disc 2-17.

The belts 8 1- and 85 are shifted by fingers or pins in a shipper rod 89 connected to a bell crank 90 pivoted at 91 and having one arm thereof extending into the path of pins 92 (Fig. 8) which may be placed in. selected holes 93 (Fig. 1) in a bar or plate 94 bolted to the side of the carriage ('36. By placing pins 92 in properly selected holes 93, in the plate 9%, the shipper will be actuated at each end of the desired path of travel to shift the belts 8i and 85 to move the carriage in the opposite direction, the carriage thus being reciprocated between fixed limits of travel without further attention from the operator.

For turning and accurately positioning the stone S upon the carriage G6, I provide the handling mechanism shown in Figs. 7 to 10. A trouglrlike casting 95 extends transversely across the carriage 6 near the middle ot its length and constitutes a guide way for a transfer car 96. The car 96 is provided with rolls or wheels 97 running' on slightly raised surfaces 98 in the bottom, of the trough 95. The upper face of the car 96 is recessed to receive a turn table 99 su ported by balls 1.00 in a circular ball race 111 the recess of the casting 96. 99 is provided with spaced projections 191 extending upwardly and adapted to engage the stone S as the casting 95 and car 96 are raised.

A threaded rod 102 extends through a bearing 103 in the end of the casting 95 and is held from longitudinal movement therein by a collar 104. The rod 192 is threaded in a nut 105 secured to the car 96 and at its outer end is provided with a hand wheel 196. The casting 95 normallv icsts upon the framework of the carriage (36. with the upper ends of the projections 101 below the level. of the cross bars 135, but 1 have provided means for raising the casting 95 when it is desirable to turn or adjust the stone S.

For this pui pose a pair of eccentric links 107 and 108 are provided at each end of the A Each link is pivoted by a pin 109 to lugs or projections 110 on the under side of the casting 95. At their lower ends the links 197 and 198 are enlarged to form bearings for eccentric discs '111 mounted on a pair of cam shafts 112 and 113. The sha it. 112 is connected to the shaft 113 by a pair of large spur gears 11 i and 115. A hand whccl 116 (Fig. 7) is connected by a pinion 117. gear 118 and pinion 119 to the gear 115. By turning the handle no the cam shafts 112 and 113 may be rotated and the casting 95 may be moved to raise the stone S above the cross bars 5, the gear train and eccentric links permitting a heavy weight to be lifted with comparative ease. W'hen the stone has been thus raised above the carriage. it may The turn table be moved toward or away from the grinding wheels by means of the hand wheel 106 and may be turned or reversed on the turn table 99.

I have thus provided a very convenient mechanism for quickly and easily placing a heavy block of stone in any desired transverse or angular position on the carriage.

Having thus described the details of my improved edge lining machine, the method of operation and advantages thereof will be readily understood. The main driving mechanism is preferably enclosed and covered with a platform 1.20 as shown in Fig. 2, thus protecting the machinery from dirt or injury and providing a convenient station from which the machine may be operated. The stone may be easily raised, turned and transversely adjusted by means of the hand wheels 116 and 106 as above described. The grinding wheels IV and IV may be raised or lowered by engaging the clutches 33 and 4:6 by means of suitable clutch levers not shown and the speed and direction of such adjustment is varied by shifting the position of the wheel 37 relative to the disc 38. The range of travel of the carriage 66 may be adjusted by placing pins 93 in selected holes in the plate 94.

All of the necessary controlling operations are thus conveniently handled from a single position of the operator, and by the use of this machine the production of finished edges upon blocks of granite or other stone is accomplished with a minimum expenditure of time and labor.

In actual operation it is desirable to provide two carriages 66 so that one carriage may be loaded while the machine is finishing the block of stone upon the other carriage, after which the finished stone may be removed and the unfinished stone substituted without loss of time. In this Way the operation of the machine may be made substantially continuous and the output is greatly increased.

Having thus described my invention, it will be evident that changes and modifications may be made therein by those skilled in the art within the spirit and scope of my invention as set forth in the claims, and I do not wish to be otherwise limited to the details herein disclosed but what I claim is 1. An edge lining machine having, in combination, a pair of grinding wheels, and means to raise and lower said wheels independently of each other, said means including a friction wheel and disc by adjustment of which the direction and speed of movement may be controlled.

2. An edge lining machine having, in combination, a pair of grinding wheels, separate bearing brackets supporting said wheels, an elevating shaft for each bracket, a friction disc, a friction wheel movable across the face of said disc, a cross shaft on which said wheel is mounted, and a driving connection from said cross shaft to each elevating shaft, said connection including clutches by which said shafts may be separately controlled.

3. In an edge lining machine, a grinding wheel, a carriage adapted to support a block of stone, means to move said carriage ast said wheel, and means on said carriage efiective to raise said stone from the normal support-ing surface of said carriage, and to move said raised stone relative to said carriage. v

4. In an edge lining machine, a grinding wheel, a carriage adapted to support a block of stone, means to move said carriage past said wheel, and means on said carriage effective to raise said stone from the normal supporting surface of said carriage, said means including a turn table on which said stone may be moved angularly.

5. In an edge lining machine, a grinding wheel, a carriage adapted to support a block of stone, means to move said carriage past said wheel, and means on said carriage effective to raise said stone from the normal sup porting surface of said carriage, said means including a car movable on guide ways transversely of said carriage.

6. In an edge lining machine, a pair of grinding wheels, a carriage adapted to support a block of stone, means to move said carriage past said wheels, a transfer car, guide ways for said car vertically adjustable on said carriage, and means to raise and lower said guide ways.

7. In an edge lining machine, a pair of grinding Wheels, a carriage adapted to support a block of stone, means to move said carriage past. said wheels, and a stone elevating device on said carriage comprising eccentric links, eccentric cams for said links, and means to rotate all of said cams simultaneously.

8. In an edge lining machine, a vertically movable grinding wheel shaft, a horizontally movable motor, a belt drive from said motor to said shaft, and means to hold said motor and shaft in definite spaced relation.

9. In an edge lining machine, a pair of grinding wheels, shafts for said wheels, each having a driving pulley thereon, bearings for each shaft, a frame on which said bearings are vertically adjustable, a separate motor belt-connected to each grinding pulley, a support. for each motor on which said motor is horizontally movable, and a link effective to hold said motor and grinding shaft in definite spaced relation.

In testimony whereof I have hereunto affixed my signature.

ELROY A. CHASE. 

